```go
package main

import "fmt"

func solve() {
    var n, m, k int
    fmt.Scan(&n, &m, &k)
    
    grid := make([]string, n)
    for i := 0; i < n; i++ {
        fmt.Scan(&grid[i])
    }
    
    covered := make([][]bool, n)
    for i := 0; i < n; i++ {
        covered[i] = make([]bool, m)
    }
    
    _ = k
    _ = covered
    _ = grid
}

func main() {
    solve()
}
```